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Gold is a chemical element with the symbol Au (from the Latin word aurum) and the atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals. It is one of the least reactive chemical elements ...
Exceptionally, the golden ratio is equal to the limit of the ratios of successive terms in the Fibonacci sequence and sequence of Lucas numbers: [42] φ. In other words, if a Fibonacci and Lucas number is divided by its immediate predecessor in the sequence, the quotient approximates . For example, and.
Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
Bitcoin (abbreviation: BTC; sign: ) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees the ...
Eurovision Dance Contest. American Song Contest. The Eurovision Song Contest ( French: Concours Eurovision de la chanson ), often known simply as Eurovision, is an international song competition organised annually by the European Broadcasting Union. Each participating country submits an original song to be performed live and transmitted to ...
- Music Competition
Gender, gender identity, and being transgender are distinct concepts from sexual orientation. Sexual orientation is an individual's enduring pattern of attraction, or lack thereof, to others (being straight, lesbian, gay, bisexual, asexual, etc.), whereas gender identity is a person's innate knowledge of their own gender (being a man, woman, non-binary, etc.).
Chad is a large landlocked country spanning north-central Africa. It covers an area of 1,284,000 square kilometres (496,000 sq mi), [4] lying between latitudes 7° and 24°N, and 13° and 24°E, [44] and is the twentieth-largest country in the world. Chad is, by size, slightly smaller than Peru and slightly larger than South Africa.
